How the estimate works
The calculation is straightforward: multiply the number of rolls by sheets per roll to get the total sheet count, then divide by the number of sheets you use per day. The result is your supply duration in days, which is then converted to weeks and months for easier interpretation.
Average daily toilet paper usage varies widely. Studies suggest the global average is roughly 50 to 100 sheets per person per day, but individual habits, household size, and roll type (single-ply vs double-ply) all affect actual consumption.
Days of supply = (Rolls × Sheets per roll) ÷ Sheets per day
For example, 12 rolls with 200 sheets each at 57 sheets per day lasts about 42 days.